Explosive-engine.



0. E. BABTHEI..

ExPLosIvE ENGmE.

APPLICATION FILED APR. II. I9l6.

Patented July 31, 1917.

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UMTED sTATEs'PATENT OFFICE.

OLIVER E. BARTHEL, OF DETROIT,- MICHIGAN, ASSIGNOR TO PITTSBURGH MODEL ENGINE COMPANY, OF PITTSBURGH, PENNSYLVANIA, A. CORPORATION OF PENN- SYLVANIA.

EXPLOSIVE-ENGINE.

Specification of Letters Patent.

Patented July 31, 191 '7.

To all 'whom t may concern:

Be it known that I, OLIVERE. BARTHEL, a citizen of the United States of America, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Explosive-Engines, of which the following is a specication, reference being had therein to the accompanying drawings.

This invention relates to explosive engines, and has particular reference to novel valve operating mechanism therefor.

My invention aims to furnish a multi-cylinder explosive engine with an adjustable valve operating mechanism including cam actuated fingers for operating the valves of the engine, and these fingers may be minutely adjusted during the operation of the engine.

My invention further aims to provide a valve operating mechanism for explosive engines which is positive in its operation, reliable, and of such construction that easy access can be had to the same for adjustment purposes or for maintaining the mechanism` in an operative condition.

My invention will be hereinafter described and then claimed, and reference will now be had to the drawing, whereind Figure 1 is a vertical cross sectional view of a portion of an engine provided with valve operating mechanism in accordance with my invention,

Fig. 2 is a horizontal sectional view of a portion of the same, and

Fig. 3 is a cross 'sectional view of a nger.

In the drawing, 1 denotes a portion of a cylinder forming part of a multi-cylinder engine, and on the engine is a head 2 providing intake and exhaust ports for the cylinders of the engine. The head 2 has been illustrated as having a passage 3 and a port 4, both of which are surrounded by a `water jacket 5. The port 4 aords a seat for a valve 6 of the puppet type and said valve has a rod 7 extending upwardly through a bushing 8, through a spring chamber 9 and into an operating compartment 10 of the head 2.

The valve rod 7 within the chamber 9, has a fixed guide member 11 coperating with a member 12 on the bottom of the chamber in valve rod, and the expansive force of this spring holds the valve rod normally elevated and the valve 6 seated or closed. Access is had toythe spring chamber 9 by removing detachable side plates 14a of the head 2.

The puppet valves are preferably arranged in staggered relation to each other on opposite'sides of the central plane of the cylinder 1 and in the chamber 10 of the head 2 are staggered bosses 14 correspondingin number to the valve rods 7. Each boss has a smooth bore 15 and in the bore 'is an adjustable sleeve 16, said sleeve having the outer end thereof closed and both ends exteriorly screwthreaded. The outer end of the sleeve receives a cap 17 extending into an enlarged portion 18 of the bore 15, and the inner end ofthe sleeve receives jamb and lock nuts 19. It is by virtue of the nuts 19 and the cap 17 that the sleeve 16 may be minutely shifted longitudinally of the bore 15, and to prevent rotation of said sleeve in the bore, the boss 14 has a pin 2O extending into a longitudinal slot 21 in the sleeve 16.

Extending into the inner open end of the of the chamber 10, is a coiled spring 26. 4

The expansive force of this spring is adapted to hold the finger 22 elevated with a wear plate 27 thereof normally in engagement with the cam member 28 keyed or otherwise mounted upon a cam shaft 29, journaled in bearings 30 provided therefor on the head 2. The chamber 10 is closed by a cap or cover 31 suitably connected to the head 2.

' With the upper end of the valve body 7 extending into the groovein the outer` end of the linger 22, said finger cannot laterally shift relative to the upper end of the valve rod, consequently when said nger is depressed by the cam 28 impinging upon the wear plate 27 ofthe linger 22, the beveled or inclined seat 24 is caused to ride upon the upper end of the valve rod and lower the same to open the valve 6. Since the spring 26 holds the wear plate 23 of the finger 22 normally in engagement with the cam member 28, the spring 13 can easily elevate the valve rod 7 and hold the valve 6, thus restoring the parts to normal position.

The alternate and staggered vrelation of the fingers 22 relative to the cam shaft 29 is clearly shown in Fig. 2, and even while the engine is in operation, the ca or cover 31 may be removed and the cap 1 and nuts 19 of each sleeve 16 adjusted to shift the 10 sleeve longitudinally of the boss to correctly position the finger 22 relative to its valve rod 7. The beveled or inclined seat 24 of the linger is therefore a factor in obtaining a desired movement of the valve rod 7 by a finger 22 after the linger has been properly set, and since the cap 17 and the nuts 19 can be easily removed, it is possible to bodily remove a sleeve and its finger when necessary.

20 y In the operation of explosive engines, the valve rods are subjected to expansion and contraction, and by reason 'of a great heat at the valve ends of the rods and said rods being of considerable length, there is an appreciable elongation of thevalve rods when the engine is placed in operation. Naturally there is a certain clearance betweenthe valve 'rods and the direct actuating means thereof, and in adjusting the actuatingL 3o means and valve rodsprior to placing the engine in operation, provision must be made vfor such clearance, otherwise, the valves of the rods could not properly seat. When such a clearance is not considered, there is a loss of compression and other difficulties are encountered which render the engine anything but effective. It is therefore evident that a very line clearance calculation must be made in order that valves may 40 properly seat, without too great a clearance, which produces noise and considerable wear. It is furthermore evident that the best time to provide for such clearance, and ease of operation is after elongation of a valve rod,

consequently I have devised a means'of adjusting the actuating means of the valve l rods after the engine is placed in operation.

v The beveled or inclined seats of the fingers not only compensate forwear` of the contacting faces of the fingers and the upper ends of the valve rods, but permit ofthe fingers being minutely shifted whereby an accurate and exact seating of thevalve can be actually accomplished. The inclination or bevel of the ends of the lingers also permits of said fingers being maintained in proper relation to a cam shaft and the upper ends of the valve rods, whereby there will be no noise or lost motion between the l valve' rods, the lingers or the actuating means thereof.

My invention is not necessarily limited to a multicylinder engine or to an engine having a cam shaft in its head, and while in the drawing, there is illustrated a preferred 6i embodiment of my invention, it is to be understood that the structural elements are susceptible to such variations and modifications as fall within the scope of the appended claims.

What I claim is 1. In a valve operating mechanism for explosive engines, the combination with a cylinder head, valve rods extending therein, and a cam shaft, of an adjustable sleeve slidable in said head for each valve rod, means engaging said cylinder head at each end of said sleeve for holding said sleeve in an adjusted position, and a finger for each sleeve having the inner end thereof pivoted in the outer end of the sleeve and adapted to be actuated by said cam shaft'to move said valve rod.

2. In an explosive engine, a cylinder head having bosses, a cam shaft, valve rods extending into said cylinder head, adjustable sleeves in said bosses, and fingers having the inner ends thereof pivoted in the outer ends of said sleeves and extending between said cam shaft and said valve rods, said lingers having a long leverage within said sleeves and adapted to `impart movement to said valve rods from said cam shaft'.

' 3. In an explosive engine, a cylinder head having bosses, a cam shaft, valve'rods ex- 95 tending into said cylinder head, sleeves slidable in said bosses-'means at the inner and outer ends of said sleeves to hold said sleeves relative to said bosses, lingers having the inner ends thereof pivoted in the outer ends of said sleeves and extending between said cam shaft and said valve rods and adapted to impart movement to said valve rods from said cam shaft.

4. In a multi-cylinder explosive engine,

the combination with a cylinder head, and staggeredly arranged valve rods extending into said. head and normally maintained in elevated position, of valve sleeves slidable in said cylinder head, capable of being inde- .110 pendently adjusted fingers pivoted in the outer ends of said s eeves and extending out of the inner ends thereof and having beveled ends on the upper ends of saidvalve rods and adapted to lower the same, means above `said ngers adapted to depress the same,

and means below said fingers holding said fingers normally in kengagement withl Said means.

In testimony whereof I ax my signature in presence of two witnesses.

OLIVER E. BARTHEL.

i Witnesses:

ANNA M. DoRR, G. E. MCGRANN. 

